Everything (expressed with language) is just a model of something else. By making the model follow some simple rules which we think the real thing follows as w

Everything (expressed with language) is just a model of something else. By making the model follow some simple rules which we think the real thing follows as well we can reason about what happens when some inputs to the real thing being modeled change, by runnign our model (-simulation). Thus you could add to your list: "Everything is just a simulation". Except the real thing of course :-)